EFM ipTIME A8004T Vulnerability: Remote Stack-Based Buffer Overflow Disclosed
The National Vulnerability Database has detailed CVE-2026-8234, a high-severity stack-based buffer overflow affecting EFM ipTIME A8004T routers running firmware version 14.18.2. This vulnerability, with a CVSS score of 8.8, resides within the formWifiBasicSet function in the /goform/WifiBasicSet file, specifically triggered by manipulating the security_5g argument.
This isn’t just theoretical; the exploit details are publicly disclosed. Attackers can initiate this attack remotely, making it a critical concern for any organization or individual using the affected device. The vendor has reportedly not responded to early disclosure attempts, leaving users exposed to a known, exploitable flaw.
From an attacker’s perspective, a remote, publicly disclosed vulnerability with no vendor patch is a goldmine. Router vulnerabilities are particularly attractive as they provide a persistent foothold into a network, enabling traffic interception, further internal reconnaissance, or the establishment of botnets. Defenders need to recognize that this isn’t a future threat; it’s a current, active risk.
What This Means For You
- If your network relies on an EFM ipTIME A8004T router, especially version 14.18.2, you are exposed to a severe, remotely exploitable vulnerability. Prioritize immediately isolating these devices or replacing them if a patch isn't available. Assume compromise and audit network traffic originating from or passing through these routers for anomalous activity.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-8234: EFM ipTIME A8004T WifiBasicSet Buffer Overflow Attempt
title: CVE-2026-8234: EFM ipTIME A8004T WifiBasicSet Buffer Overflow Attempt
id: scw-2026-05-10-ai-1
status: experimental
level: critical
description: |
Detects attempts to exploit CVE-2026-8234 by targeting the /goform/WifiBasicSet endpoint with a manipulated 'security_5g' parameter, which triggers a stack-based buffer overflow. This is a critical initial access vector for this vulnerability.
author: SCW Feed Engine (AI-generated)
date: 2026-05-10
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-8234/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/goform/WifiBasicSet'
cs-uri-query|contains:
- 'security_5g='
cs-method|exact:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-8234 | Buffer Overflow | EFM ipTIME A8004T version 14.18.2 |
| CVE-2026-8234 | Buffer Overflow | Vulnerable function: formWifiBasicSet in /goform/WifiBasicSet |
| CVE-2026-8234 | Buffer Overflow | Vulnerable argument: security_5g |
| CVE-2026-8234 | RCE | Remote exploitation possible |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 10, 2026 at 10:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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